1 /* Machine-dependent ELF indirect relocation inline functions.
2 SPARC 64-bit version.
3 Copyright (C) 2010-2021 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #ifndef _DL_IREL_H
21 #define _DL_IREL_H
22
23 #include <stdio.h>
24 #include <unistd.h>
25 #include <dl-plt.h>
26 #include <ldsodefs.h>
27
28 #define ELF_MACHINE_IRELA 1
29
Elf64_Addr(always_inline)30 static inline Elf64_Addr
31 __attribute ((always_inline))
32 elf_ifunc_invoke (Elf64_Addr addr)
33 {
34 return ((Elf64_Addr (*) (int)) (addr)) (GLRO(dl_hwcap));
35 }
36
37 static inline void
38 __attribute ((always_inline))
elf_irela(const Elf64_Rela * reloc)39 elf_irela (const Elf64_Rela *reloc)
40 {
41 unsigned int r_type = (reloc->r_info & 0xff);
42
43 if (__glibc_likely (r_type == R_SPARC_IRELATIVE))
44 {
45 Elf64_Addr *const reloc_addr = (void *) reloc->r_offset;
46 Elf64_Addr value = elf_ifunc_invoke(reloc->r_addend);
47 *reloc_addr = value;
48 }
49 else if (__glibc_likely (r_type == R_SPARC_JMP_IREL))
50 {
51 Elf64_Addr *const reloc_addr = (void *) reloc->r_offset;
52 Elf64_Addr value = elf_ifunc_invoke(reloc->r_addend);
53 struct link_map map = { .l_addr = 0 };
54
55 /* 'high' is always zero, for large PLT entries the linker
56 emits an R_SPARC_IRELATIVE. */
57 sparc64_fixup_plt (&map, reloc, reloc_addr, value, 0, 0);
58 }
59 else if (r_type == R_SPARC_NONE)
60 ;
61 else
62 __libc_fatal ("Unexpected reloc type in static binary.\n");
63 }
64
65 #endif /* dl-irel.h */
66